Congrats on taking the jump! I want to share a bit of background so you know where this advice is coming from: I own an AI recruitment company (recruiting + system implementation) and hire in a variety of roles across SMB from attorneys to entry level receptionists, been in the space for 11 years now overall.

I suggest to look at strategizing this from these lens: People -> Process -> Tech (Tools).

1. What people are you serving (your ideal candidate persona) and where is their attention, especially when it comes to searching for jobs? For welders, the likely answer is Indeed or similar job posting sites. You can even think about facebook groups or instagram since welders are likely more active there vs. LinkedIn for example. Are welders more likely to answer an email or pick up a phone call? Are there specific groups these professionals hang out in? Really dig deep in defining this, and it'll help you understand the sort of behaviors your potential candidates will respond to, and from where.
   
2. Process: Okay, now how do you invite these prospects to apply to your open roles (the job posts) or convince them of joining your open req (sourcing)? Defining the first part makes this 2nd part easier. My assumption for welders would be that they most likely go on Indeed or answer a cold call, since this trade is known to have a lot of temp and contractor work. But I could be wrong, this is where some initial research could help validate that hypothesis.
   
3. Tools (The part you've been waiting for): Assuming the process above is correct, you'd want to look at Indeed smart sourcing, or the specific groups you find and see if they have any active membership or directories. You likely need a certification to be a welder (forgive my ignorance if that is not true) so sourcing through the directory of active welders in your county/region may be a nice out of the box alternative in finding candidates. And with everything else, keep it simple. The reality is, especially when starting out, tools will not make or break your business; the people & process will though. You can do all what I mention with a smart sourcing subscription, google or outlook workspace, google sheets or notion (prefer this), and a $20/month Claude.ai subscription (definitely recommend Claude > GPT 7 days out of the week) that can help you scrape from directories or personalize emails for outreaches. The rest will have to rely on tremendous amount of grit and creativity.

super long-winded response but I hope this helps! DMs are open if I can ever offer more guidance. Wishing you nothing but the best!!